US3139621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinning solutions of synthetic fibers
Assignee: Celanese Corp
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Filing: 1960-11-04
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Granted: 1964-06-30
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Expires: 1980-11-04
Abstract
No abstract record available.
Inventors
- 👤 Floyd D Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:52
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/44; D01F6/52; C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08L; C08L31/00; C08L31/02; C08L31/04; C08L35/00; C08L35/04; D01F6/54; C08L33/00; C08L33/24; C08L33/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
34 words
DISPERSE DYED FILAMENTARY MATERIAL COMPRISING A SUBSTANTIALLY UNIFORM BLEND OF 85 TO 96 PERCENT BY WEIGHT OF APPROXIMATELY EQUIMOLAR VINYLIDENE CYANIDE: VINYL ACETATE COPOLYMER WITH 15 TO 4 PERCENT BY WEIGHT OF POLYMERIZED N,N-DIMETHYLACRYLAMIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |